Door holder



Patented May 17, 1927. 7

UNITED STATES PATENT OFFICE.

NORMAN B. HUIRD, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE AMERICAN HARDWARE CORPORATION, OFNEW BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

, noon HOLDER.

Application filed September 16, 1926. Serial No. 135,781.

My invention relates to a door holder for holding a door in predetermined open position. 7

It is an object of the invention to provide an improved door holder whichwill be'simple in construction and effective in use for holding a'door in predetermined open p,osi-, tion. 7

It is a further object to improve certain details of construction in a door holder of the character indicated.

Briefly stated, in the preferred form of the invention I employ a pair of arms, one to be secured to a door and the other to be secured to, a door casing. These arms are pivotally connected to each other at their outer ends. One of the arms at one side may have one or more cam surfaces, and one or more wedging members are provided for coaction with the cam surfaces on said arm. Means may be provided for adjusting the limit of swinging movement of said arms and consequently determining the position at which a door is held. i

In the drawings which show, for illustrative purposes only, a preferred form of the invention- Fig. 1 is a top plan view of a door holder embodying features of the invention and applied to a door and door casing;

Fig. 2 is an enlarged fragmentary, sec-.

tional view through the pivot end of the door holder shown in Fig. 1;

Fig. 3 is a perspective view of parts shown in Fig. 2, various elements being separated to facilitate illustration.

In said drawing, 5 indicates a door casing while 6 indicates a usual door. My improved door holder includes an arm 7 wh ch may be pivotally secured to the door casing 5, and a second arm 8, which may be pivotally secured to the door 6 or to a door closer 9 carried thereby. Thearms 7-8 are pivotally connected to each other by means of a pin or bolt 10.

In the preferred form shown, the arm 8 is provided with an angular aperture or bore 11, and the pin 10 is provided with an angular portion 12 fitting the bore 11 and thus non-rotatably holding the pin 10 in the arm 8. The arm 7 is provided with a circular bore 13 adapted to it the correspondingly, shaped portion 14: on the pin 10. The two arms 7-8 are thus pivotally connected together. If desired, the arms 7-8 may have abutting plane bearing surfaces coacting' with each other and, in the form shown, I interpose a thin washer or wear disk 15 between these bearing surfaces.

The outer side of the arm 7 may have one or more arcuatc camsurfaces l6l7 and,

pin 10. The cross pin 20 mayv loosely fit.

the transverse aperture in the pin l0, and wedges 1819 are loosely held or supported over the corresponding cam surfaces 16-17 respectively as shown particularlv in Figs.

and 8. If desired, a suitable cover member 21 may be provided for housing the cam surfaces and wedging members and provid ing a structure of finished appearance. The lower end of the pivot pin 10 mayv be threaded and an adjusting nut 22 provided thereon for varying the limit of the swinging movement of the arms 7-8, as will be described.

The operation of the device is as follows:

When the parts are assembled, as shown,

for example in Fig. 1, and the door is opened, the arms 7-8 Wlll. swing relatively to each other. hen the nut 22 isturned up to the desired position, the relative swinging movementzbetween the arms78 will be limited by the wedging members 18- 19 riding up on their respective cam surfaces 16-17. By backing ofi on the nut 22, a more extensive. swinging between the arms 7-8 is permitted and, conversely, by turning up on the nut- 22, the extent of swinging between the. arms 78 will be decreased. By reason of the fact that thepivot pin 10 always turns with the arm 8, there is no substantial tendency of the nut 22 to I work loose after a repeated opening-and closing of the door. In the particular form shown,

wherein the arms 7-8 bear on each other through the wear washer or plate 15, the wedging means, above described, serves principally to force the two arms toward each other and the frictional force between the surfaces on the arms and the wear plate 15 hold the door in desired'position, but, of course, the friction between the wedging 

